prolog './gsp412.ijs'
NB. !: ------------------------------------------------------------------

f=:    0 !:($.0)
f=: ($.0)!:   0
f=: ($.0)!:($.0)

f=:    0 !:($.2)
f=: ($.0)!:   2
f=: ($.0)!:($.2)

f=:    3 !:($.0)
f=: ($.3)!:   0
f=: ($.3)!:($.0)

f=:    4 !:($.3)
f=: ($.4)!:   3
f=: ($.4)!:($.3)





epilog''

